Forming device



P 1932. w. D. MORRISON 1,879,411

FORMING DEVICE Filed Nov. 22. 1929 wym HA6 TORNEY,

Patented Sept. 27, 1932 WALTER D. MORRISON, OF DETROIT, MICHIGAN FORMINGDEVICE Application filed November 22, 1929; 7 Serial No. 409,135.

This invention relates to certain novel improvements in forming devicesand more particularly to a forming device used in connection with theforming of glass tubing and the like into predetermined shapes and hasfor its principal object the provision of an improved construction ofthis character which will be highly efficient in use and economical inmanufacture.

The salientobject of my invention is to provide a forming device whichmay be used in connection with the forming of glass tubing or the likeinto predetermined shapes and which will embody an arrangement wherebyportions of the tubing may be bent over other portions of the tubing.

Another object of the invention is to provide a. device of the abovedescribed character which will be of simple construction so that thenumber of parts thereof will-be reduced to a minimum which willfacilitate and simplify the use of the device.

A still further object of the invention is to provide a device of theabove described character which may be used in connection with glasstubing or the like that is in a very heated condition.

Other objects will appear hereinafter.

The invention consists in the'novel combination and arrangement of partsto be hereinafter described and claimed.

The invention will be best understood by reference to the accompanyingdrawing, showing the preferred form ofconstruction and in which:

Fig. 1 is an elevational view depicting a preferred form of constructionfor my invention;

Fig. 2 is a fragmental elevational view of the device illustrated inFig. 1 looking in the opposite direction with the tool in an invertedposition;

Fig. 3 is a fragmental view similar to Fig.

l depicting a movable portion of my invention in inoperative position;

Fig. 4 is a sectional view taken substantially on the line 4-4 on Fig.1; and

Fig. 5 is a sectional view taken substantially on the line 5-5 on Fig.1.

In the accompanying drawing wherein I have illustrated the preferredform of construction for my invention, 10 indicates a flat plate whichforms the main body portion of my' improved device. The embodiment ofthe invention illustrated is that of a forming tool particularly adaptedfor the formation of the letter R. Extending upwardly from one face ofthe plate 10 parallel to the edge 11 and away from the edge 12 I providean upstanding rib 13. Extending transversely of the plate 10in spacedrelation with the edge 14 thereof a continuation 15 of the-rib 13isprovided and this continuation extends substantially at right-angles tothe rib 1 3. The portion 15 terminates in a semi-circular portion 16which is disposed with the curvature thereof directed away from the rib13. The rib arrangement thus far described might be used in theformation of the-letter P; By referring to the drawing it may be seenthat the device in the present instance does not have a rib extendingfrom the outer end of the semi-circular portion 16 parallel to theportion 15. Extending at an angle with the rib 13 toward the edge 17 ofthe plate 10 is an upstanding rib 18, the inner end of which is spacedfrom the free'end of the rib portion 16.

My invention is intended to be employed in connection with the formationof letters from glass tubing, which letters are employed in the makingof gas filled tubing electric signs. If desired the device may be usedin connection with the tube making machine as the glass tubing as it isdelivered from such a machine is in a heated and pliable condition. Inthe formation of the letter R the glass would be arranged in abutmentwith the rib portion 13 with one end thereof ad'acent the edge 12. Thetubing is then directe up along the rib 13 and along the rib 15 andaround the semicircular portion 16 back toward the rib 13. It iscustomary at this point to bend the tube'to extend for a short distanceback along the portion extended toward the rib 13 and the tube is thenbent into engagement with the rib 15. A tube bent in this manner isdepicted'in dotted lines in the drawing and is indicated by- 19. Animportant feature of my invention resides in an arrangement which willfacilitate the bending of a tube back along the portion disposed toextend toward the rib 13 from the end of the rib 16.

The arrangement for facilitating this just set forth bend includes theopening 20 formed permit a section of the tubing 19 to be disposedintermediate the lower surface of this block 25 and the upper surface ofthe plate 10. A spring 26 extends between the lever 22 and a .stud 27 isfixed on the under surface of the plate 10 and this spring serves tonormally hold the member 21 and the block 25 in the position depicted inFig. 3. A handle 28 is connected to the lever 22 and is disposed in theposition best illustrated in Fig. 1.

In use, a section of glass tubing in heated condition, preferably from atube making machine or a tube made by hand from molten glass while stillin a plastic condition, is directed around the ribs in the manner setforth and after a section thereof has been directed around the portion16 a portion is directed toward rib 13 and if desired a portion may beout from the rib 13 to facilitate this directing of the tubing 19. Afterthe tubing 19. has been directed in this manner the handle 28 ismanipulated to move the member 21 and the block 25 from the positiondepicted in Fig. 3 into the position depicted in Fig. 1, and it istherefore manifest that the section of tubing may be bent back over theupper surface of the block 25 and then down along the rib 18.

It is manifest that the particular disposition of the member 21 and theblock 25 will vary dependent upon the letter being formed for thebending of a section of tubing over another section in the manner setforth or as it is called doubling back is required in the formation ofthe majority of letters and it is within the purview of this inventionto locate the portion about which the portion is bent back at theposition required.

While I have illustrated and described the preferred form ofconstruction for carrying my invention into effect, this is capable ofvariation and modification, without departing from the spirit of theinvention. I, therefore, do not wish to be limited to the precisedetails of construction set forth, but desire to avail myself of suchvariations and modifications as come Within the scope of the appendedclaims. I

Having thus described my invention what I claim as new and desire toprotect by Letters Patent is:

1. In a device of the character stated, a member and stationary guidingmeans thereon, movable guiding means, means for moving said movableguiding means, and means for normally holding said movable guiding apivot for holding one portion of said tubing so that said tubing may bebent with said member as a pivot and means including a handle for movingsaid member over, and relative to said base.

3. A device for forming characters from glass tubing in plasticcondition comprising a base having an opening extendingtherethrough,-upstanding guiding means on one surfaceof said base of apredetermined configuration and around which said tubing is directed,and a member movable through said opening'and having a head disposedthereabove providing a pivot for holding one portion of said tubing sothat said tubing may be doubled back upon itself, and means for movingsaid member in said opening, said means including a handle pivotallymounted on said base on the surface thereof opposite said first namedsurface, said handle including a portion connected to said member, andresilient means for normally urging said head toward one end of saidopening.

1. A device for forming configurations in material in plastic condition,comprising a relatively stationary base, material guiding meansprojecting from said base, of a predetermned configuration and aroundwhich said material is adapted to be directed, a member movable over andrelative to said base and providing a pivot for holding one portion ofsaid material so that said material may be bent with said member as apivot, and means including a handle for moving said member over, andrelative to, said base.

In testimony whereof I affix my signature.

WALTER D. MORRISON.

